A5069167303- Advanced X-ray Imaging Techniques
- Advanced Electron Microscopy Techniques and Applications
- X-ray Spectroscopy and Fluorescence Analysis
- Crystallography and Radiation Phenomena
- Nuclear Physics and Applications
- Laser-Plasma Interactions and Diagnostics
- Electron and X-Ray Spectroscopy Techniques
- Particle Accelerators and Free-Electron Lasers
- Astrophysical Phenomena and Observations
- Hydrocarbon exploration and reservoir analysis
- Catalytic Processes in Materials Science
- Medical Imaging Techniques and Applications
- Advanced Surface Polishing Techniques
- Advanced X-ray and CT Imaging
- Pediatric Urology and Nephrology Studies
- Mesoporous Materials and Catalysis
- Geological Modeling and Analysis
- Astronomical Observations and Instrumentation
- Chalcogenide Semiconductor Thin Films
- Geomagnetism and Paleomagnetism Studies
- GaN-based semiconductor devices and materials
- Advanced optical system design
- Trace Elements in Health
- Catalysis and Oxidation Reactions
- Radioactivity and Radon Measurements
MAX IV Laboratory
2019-2025
Lund University
2019-2025
Technical University of Denmark
2023
KTH Royal Institute of Technology
2023
Universität Hamburg
2017-2021
Deutsches Elektronen-Synchrotron DESY
2016-2021
Bhabha Atomic Research Centre
2021
Université Grenoble Alpes
2021
Elkhorn Slough Foundation
2021
Paul Drude Institute for Solid State Electronics
2017
The NanoMAX hard X-ray nanoprobe is the first beamline to take full advantage of diffraction-limited storage ring at MAX IV synchrotron and delivers a high coherent photon flux for applications in diffraction imaging. Here, we characterize its focused beam using ptychographic analysis. We derive profiles energy range 6-22 keV estimate based on probe mode decomposition approach.
NanoMAX is the first hard X-ray nanoprobe beamline at MAX IV laboratory. It utilizes unique properties of world's operational multi-bend achromat storage ring to provide an intense and coherent focused beam for experiments with several methods. In this paper we present optics design in detail, show performance figures, give overview surrounding infrastructure diffraction endstation.
This paper presents a deep learning algorithm for tomographic reconstruction (GANrec). The uses generative adversarial network (GAN) to solve the inverse of Radon transform directly. It works independent sinograms without additional training steps. GAN has been developed fit input sinogram with model generated from predicted reconstruction. Good quality reconstructions can be obtained during minimization fitting errors. is self-training procedure based on physics model, instead data. showed...
The successful synthesis of hierarchically structured titanium silicalite-1 (TS-1) with large intracrystalline macropores by steam-assisted crystallisation mesoporous silica particles is reported. macropore topology was imaged in 3D using electron tomography and synchrotron radiation-based ptychographic X-ray computed tomography, revealing interconnected within the crystals accounting for about 30 % particle volume. study formation mechanism revealed that act as a sacrificial template during...
Abstract The synthesis of hierarchically porous materials usually requires complex experimental procedures, often based around extensive trial and error approaches. One common strategy is the sol–gel method, although relation between parameters, material structure function has not been widely explored. Here, in situ 2D hard X‐ray ptychography (XRP) 3D ptychographic computed tomography (PXCT) are applied to monitor development hierarchical porosity Ni/Al 2 O 3 Al catalysts with connected...
The diffraction endstation of the NanoMAX beamline is designed to provide high-flux coherent X-ray nano-beams for experiments requiring many degrees freedom sample and detector. equipped with high-efficiency Kirkpatrick-Baez mirror focusing optics a two-circle goniometer supporting positioning scanning device, carry compact environment. A robot used as detector arm. endstation, in continued development, has been user operation since summer 2017.
Ptychographic X-ray imaging at the highest spatial resolution requires an optimal experimental environment, providing a high coherent flux, excellent mechanical stability and low background in measured data. This requires, for example, stable performance of all optical components along entire beam path, temperature stability, robust sample optics tracking system, scatter-free environment. contribution summarizes efforts these lines to transform nanoprobe station on beamline P06 (PETRA III)...
Imaging large areas of a sample non-destructively and with high resolution is great interest for both science industry. For scanning coherent X-ray diffraction microscopy, i. e., ptychography, the achievable scan area at given spatial limited by photon flux modern sources. Multibeam ptychography can improve speed several parallel mutually incoherent beams, e. g., generated illuminating multiple focusing optics in partially beam. The main difficulty this scheme robust separation superimposed...
Three-dimensional (3D) x-ray microscopy by ptychographic tomography requires elaborate numerical reconstructions.We describe a coupled ptychography-tomography reconstruction algorithm and apply it to an experimental computed data set of catalyst particle.Compared the traditional sequential algorithm, in which projections are reconstructed serve as input for subsequent tomographic reconstruction, reconstructs 3D volume with higher spatial resolution over larger field view.Coupling from...
The recent success in the development of high precision printing techniques allows one to manufacture free-standing polymer structures quality. Two-photon polymerization lithography is a mask-less technique with down 100 {\mu}m resolution that provides full geometric freedom. It has recently been applied nanofabrication X-ray compound refractive lenses (CRLs). In this article we report on characterization two sets CRLs different design produced by two-photon induced lithography.
In this Letter, we report on the creation of hard x-ray beams carrying orbital angular momentum topological charge −ℏ and −3ℏ at a photon energy 8.2 keV via spiral phase plates made out fused silica by ultrashort-pulsed laser ablation. The feature smooth ramp with 0.5 μm nominal step height surface roughness μm. measured vortex show submicrometer-sized donut rings agree well numerical modeling. Fused are potentially suited to manipulate electromagnetic field in highly intense free-electron sources.
The CoSAXS beamline at the MAX IV Laboratory is a modern multi-purpose (coherent) small-angle X-ray scattering (CoSAXS) instrument, designed to provide intense and optionally coherent illumination sample position, enabling imaging speckle contrast techniques. tracing simulations used design optics have predicted total photon flux of 10 12 –10 13 photons s −1 degree coherence up 10% 7.1 keV. normalized this instrument were experimentally determined using separability ptychographic...
Hard X-rays are needed for non-destructive nano-imaging of solid matter. Synchrotron radiation facilities (SRF) provide the highest-quality images with single-digit nm resolution using advanced techniques such as X-ray ptychography. However, or field view is ultimately constrained by available coherent flux. To address this, beam's incoherent fraction can be exploited multiple parallel beams in an multibeam ptychography (MBP) approach. This expands domain to larger samples more rapid...
<title>Abstract</title> Ptychography has gained significant prominence at synchrotron facilities globally for characterizing the topological structure and intricate properties of biological material specimens nanometer or atomic scale. Its high-resolution potential relies on accurate scan position information, substantial overlap ratio, a stable probe; however, fulfilling these requirements becomes increasingly challenging as resolution approaches scales. This paper proposes multiple-shot...
Synchrotron-radiation nano-X-Ray Fluorescence (XRF) is a cutting-edge technique offering high-resolution insights into the elemental composition of biological tissues, shedding light on metabolic processes and element localization within cellular structures. In context Idiopathic Pulmonary Fibrosis (IPF), debilitating lung condition associated with respiratory complications reduced life expectancy, nano-XRF presents promising avenue for understanding disease's intricate pathology. Our...
Abstract X-ray ptychography provides the highest resolution non-destructive imaging at synchrotron radiation facilities, and efficiency of this method is crucial for coping with limited experimental time. Recent advancements in multi-beam have enabled larger fields view, but spatial large 3D samples remains constrained by their thickness, requiring consideration multiple scattering events. Although challenge has been addressed using multi-slicing conventional ptychography, integration not...
Abstract Ptychography is a burgeoning imaging technique that enables high-resolution, lensless reconstruction of complex samples by analysing overlapping diffraction patterns, making it invaluable in fields like materials science, biology, and nanotechnology. Real-time ptychographic reconstructions are gaining interest the scientific community as they provide immediate feedback. Yet their potential to replace offline remains uncertain, part due questions about quality resulting images. This...
Two in situ `nanoreactors' for high-resolution imaging of catalysts have been designed and applied at the hard X-ray nanoprobe endstation beamline P06 PETRA III synchrotron radiation source. The reactors house samples supported on commercial MEMS chips, were complementary ptychography (23 nm spatial resolution) transmission electron microscopy, with additional fluorescence measurements. allow pressures 100 kPa temperatures up to 1573 K, offering a wide range conditions relevant catalysis....
Modern subtractive and additive manufacturing techniques present new avenues for X-ray optics with complex shapes patterns. Refractive phase plates acting as glasses have been fabricated, spherical aberration in refractive lenses made from beryllium has successfully corrected. A diamond plate by femtosecond laser ablation was found to improve the Strehl ratio of a lens stack numerical aperture (NA) 0.88 × 10 −3 at 8.2 keV 0.1 0.7. polymer printing achieved an increase 35 NA 0.18 0.15 0.89,...
Abstract Ptychographic X-ray microscopy is an ideal tool to observe chemical processes under in situ conditions. Chemical reactors, however, are often thicker than the depth of field, limiting lateral spatial resolution projection images. To overcome this limit and reach higher resolution, wave propagation within sample environment has be taken into account. Here, we demonstrate effect recording a ptychographic copper(I) oxide nanocubes grown on two sides polyimide foil. Reconstructing using...
Nondestructive imaging with both a large field of view and high spatial resolution is crucial to understand complex materials processes in science technology. X-ray ptychography can provide highest but limited the by acquisition time coherent flux at modern x-ray sources. By multi-beam ptychography, sample be imaged parallel several spatially separated mutually incoherent beams. We have implemented this method using 3D nanoprinted optics create tailor-made arrays. The use printing allows us...
The hierarchical pore systems of Pt/Al2O3 exhaust gas aftertreatment catalysts were analyzed with a collection correlative imaging techniques to monitor changes induced by hydrothermal aging. Synergistic laboratory X-ray microtomography, synchrotron radiation ptychographic computed nanotomography, and electron tomography allowed quantitative observation the catalyst architecture from centimeter nanometer scale. Thermal aging at 750 °C in air 1050 10% H2O/air caused increasing structural...
Computed tomography spans a versatile set of techniques that range several length scales and modalities. It is common to them all the sample must be prepared in way which allows for addressing scientific question(s) posed as well being suitable specific setup experiment. We present two lathe-based preparation workflows developed prepare biomineralized samples (here bone) very different experiments terms setup, types questions asked, requirements. The first experiment, involving measurement...